The world is divided into 50×50m squares. To claim one, you have to actually be there. First claim every day is free. Crews let you and your friends mark territory in a shared colour. And the live activity feed shows every claim as it happens, where people have started plugging their own projects, turning the map into a tiny classifieds section of planet Earth. Built solo, browser-based, works in any city on Earth. Most of the planet is still unclaimed, your street probably is too.